Definition of a Sibling A sibling is a brother, sister, stepbrother, stepsister, or adopted brother or sister. For the necessary sibling relationship to exist, each person must have been a child of at least one of the same parents. The → 
How Do I Bring a Sibling to Live in the United States?
Definition of a Sibling A sibling is a brother, sister, stepbrother, stepsister, or adopted brother or sister. For the necessary sibling relationship to exist, each person must have been a child of at least one of the same parents. The → 